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Mechanical engineering

Metallurgy

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Full-Text Articles in Engineering

Finite Element Analysis Of Chip Formation In Grooved Tool Metal Cutting, Wooi Khiong Thean Jan 1998

Finite Element Analysis Of Chip Formation In Grooved Tool Metal Cutting, Wooi Khiong Thean

Retrospective Theses and Dissertations

Machining simulations of orthogonal cutting are performed using the finite element method to predict chip formation in grooved tool cutting. A flat-faced cutting tool is first simulated to check the validity of the model, and the results obtained are used as a basis for comparison in grooved tool cutting simulation. Grooved tool simulations are modeled next to investigate the effect of a groove on the chip formation process. Groove depth and width were the two parameters changed for the purpose of analyzing the chip flow characteristics, stress and strain distributions found in the chip.;For all simulated cases, it is ...


Ultrasonic Measurement Of Drawability (R-Values) Of Low Carbon Steel Sheets , Kaveh Forouraghi Jan 1995

Ultrasonic Measurement Of Drawability (R-Values) Of Low Carbon Steel Sheets , Kaveh Forouraghi

Retrospective Theses and Dissertations

The present research was designed to evaluate an ultrasonic technique for measuring the drawability of low carbon steel sheets nondestructively. This technique, which uses electro magnetic acoustic transducers (EMAT's) is embodied in a fully automatic ultrasonic device called Ultra-Form, which was developed by Iowa State University in 1990. EMAT transducers generate the ultrasonic pulses in the sheet (without any need for a coupling medium) whose velocities are then related to the microstructural factors (crystallographic texture) that control drawability in rolled sheets. Drawability (usually interpreted by measuring r-values of low carbon steels) is an important property indicative of the formability ...


Elevated Temperature Erosion Studies On Some Materials For High Temperature Applications , Jianren Zhou Jan 1991

Elevated Temperature Erosion Studies On Some Materials For High Temperature Applications , Jianren Zhou

Retrospective Theses and Dissertations

The surface degradation of materials due to high temperature erosion or combined erosion-corrosion is a serious problem in many industrial and aeronautical applications. As such, it has become an important design consideration in many situations. The materials investigated in the present studies are stainless steels, Ti-6Al-4V, alumina ceramics, with and without silicate glassy phase, and zirconia. These are some of the potential materials for use in the high temperature erosive-corrosive environments;The erosion or erosion-corrosion experiments were performed in a high temperature sand-blast type of test rig. The variables studied included the temperature, material composition, heat treatment condition, impingement velocity ...